The Best Humidifier for Large Rooms of 2022

Add soothing mist to the air in main living areas or even the entire house with one of these top humidifiers for large rooms.

By Tony Carrick | Updated Jul 25, 2022 1:49 PM and its partners may earn a commission if you purchase a product through one of our links.

The Best Humidifier For Large Room Options


A humidifier adds moisture to a home’s dry air. While a small humidifier is ideal for bedrooms and nurseries, big rooms may need a larger humidifier. Large humidifiers feature tanks capable of holding up to 4 gallons, which can release enough mist to fill up to a 4,000-square-feet area or more, improving the indoor air quality in every room of the home.

These large humidifiers are built as evaporators or ultrasonic units in both warm-mist and cool-mist options. This guide offers tips and identifies the options to consider when shopping for the best humidifier for a large room.

  1. BEST OVERALL: LEVOIT Humidifiers for Large Room Bedroom
  2. BEST BUDGET: Everlasting Comfort Cool Mist Humidifier for Bedroom
  3. BEST HIGH-CAPACITY: AIRCARE MA1201 Whole-House Console-Style Humidifier
  4. TECH PICK: LEVOIT Smart Humidifier 
  5. BEST DESIGN: AIRCARE EP9 800 Digital Whole-House Pedestal-Style 
  6. BEST WHOLE-HOUSE: Aprilaire 700 Whole Home Humidifier
  7. ALSO CONSIDER: Venta LW45 Original Airwasher 
The Best Humidifier For Large Room Options


Types of Humidifiers

Humidifiers designed to serve larger spaces come in three types: ultrasonic, evaporative, and whole-house. Whole-house humidifiers are best suited to supplying consistent humidity for your entire home. While they come with a higher up-front cost for installation, they can save you money over time. Here’s what else you need to know about these major types of humidifiers:

Ultrasonic Humidifiers

This type of humidifier uses a vibrating diaphragm that emits tiny water particles and a blower that distributes them into the air. The unit typically distributes mist upward to give the particles enough time to vaporize before they come into contact with a hard surface. Since they don’t rely on evaporation to create mist, ultrasonic humidifiers can send more moisture into the air than other types, making them ideal for large rooms. However, if the water contains minerals, they can leave white deposits on hard surfaces.

Evaporative Humidifiers

Evaporative humidifier models have a wick inside the basin that absorbs water. A blower collects dry air from the room and blows it across the wick to add moisture to the air before circulating it back into the room. Evaporative humidifiers don’t cause the white residue around the unit that other types of humidifiers can create, but they require periodic cleaning to prevent the growth of bacteria inside the reservoir.

Whole-House Humidifiers

These humidifiers connect to a home’s ductwork and add a specific amount of moisture to the air as it circulates through the home’s HVAC system. Unlike ultrasonic and evaporative humidifiers that distribute mist from a single vent mounted on the humidifier, these systems can add moisture to an entire home. Whole-house humidifiers also connect to the home’s plumbing system, which provides a limitless supply of water.

What to Consider When Choosing the Best Humidifier for Large Rooms

Understanding the different types of humidifiers on the market and their capacity is key to purchasing the right model. Ahead, learn more about humidifiers and other important features of high-capacity models.

Warm Mist vs. Cool Mist

Warm-mist humidifiers add water vapor to the air by evaporating water in a reservoir that uses heat to cause the water to vaporize, which makes them ideal for adding soothing mist in the air during cold, dry winter months. Cool-mist humidifiers, in contrast, add water to the air by blowing dry air over a saturated wick. Since cool-mist humidifiers don’t use heat, they’re ideal for warmer months and safe to use overnight or in children’s rooms.

Room Size and Tank Capacity

To serve a large room, a humidifier must be capable of producing a large quantity of mist. Most large-room models can emit enough water vapor to fill a space of at least 5,000 square feet, with whole-home models capable of producing enough mist to treat more than 4,000 square feet of space.

To handle this coverage, large humidifiers can hold up to 4 gallons of water, which gives them enough capacity to run for a day or more before requiring a refill. Some whole-home units attach directly to the home’s water lines, giving the humidifier a limitless supply of water.

Ease of Cleaning 

Most humidifiers are easy to operate (simply fill the tank and turn on the unit) yet a bit trickier to maintain. Investing in an easy-to-clean humidifier will save you time and grant peace of mind, since it’s typically recommended to clean humidifiers once a week. IIf mold is allowed to grow inside the reservoir, the humidifier can distribute mold spores throughout the air, creating a health hazard.

Besides technology and capacity, the difference between a cheap humidifier and a more expensive model is often how the water tank is designed. The water tanks on more affordable models are sometimes impossible to access directly with a brush, which means it’s necessary to soak them regularly to prevent mold growth.


Since the wick stops releasing water vapor once the humidity in the room reaches a certain level, an evaporative humidifier can’t over-humidify the room. However, once it’s on, an ultrasonic humidifier continues to release water particles into the air indefinitely, which can cause moisture to form on the walls or even create puddles on surfaces.

To prevent this problem, many evaporative humidifiers feature a built-in humidistat that turns off the unit automatically when the air in the room reaches a certain humidity level.

Additional Features

Some humidifiers have features that enhance their functionality, including controls that allow the user to adjust the humidifier’s fan speed or control the direction of mist output. Higher-end models include remote controls.

Integrated timers enable the user to set a shut-off time. Humidifiers also feature an automatic shutoff that stops the unit from running when the reservoir is dry, which prevents motor burnout. UV filtration can kill bacteria in the reservoir, and some humidifiers contain oil diffusers to release essential oils into the air.

Our Top Picks

The list below narrows the field to some of the top humidifiers on the market. The models in this list include both evaporative, whole-home, and ultrasonic humidifiers. They have enough capacity to handle large rooms ranging from 500 square feet to more than 4,000 square feet.

Best Overall

The Best Humidifier For Large Room Option: LEVOIT Humidifiers for Large Room Bedroom

Loaded with options, an attractive design, and a large capacity, the Levoit Humidifier for Large Rooms is an excellent option for big spaces. It boasts a 1.5-gallon capacity, enough for 60 hours of use before needing a refill. With a maximum mist output of 500 milliliters per hour, this model can fill rooms of up to 750 square feet with moist air.

Users can adjust the mist output, humidistat, and 1- to 12-hour automatic shutoff timer via the control panel or a convenient remote control. Other features include an aromatherapy box with absorption pads and can operate as a warm-mist or cool-mist humidifier. It features a wide opening on the top for easy cleaning.

Product Specs 

  • Type: Ultrasonic
  • Mist: Warm and cool
  • Tank Capacity: 1.5 gallons
  • Coverage Area: 750 square feet


  • 60 hours of use before refilling
  • Adjustable mist output, humidistat, and 1- to 12-hour automatic shutoff
  • Built-in control panel and additional remote control
  • Aromatherapy and absorption box included


  • Large unit; may take up counter or desk space
  • Some users report manufacturing defects

Get the LEVOIT humidifier on Amazon, The Home Depot, and Best Buy.

Best Budget

The Best Humidifier For Plants Option: Everlasting Comfort Cool Mist Humidifier for Bedroom

Considered the best humidifier for bedroom use, the Everlasting Comfort cool-mist humidifier features a 1.6-gallon tank and a powerful fan to add moisture for up to 50 hours. This is a cheap humidifier with all of the features you need and none of those you don’t. It’s best used as a small room humidifier, suitable for increasing humidity in rooms measuring up to 500 square feet. An analog knob fine-tunes the humidifier’s mist output.

This cool-mist humidifier also features an essential oils compartment for aromatherapy. It lacks a humidistat, requiring the user to monitor the humidity levels in the room to avoid over-humidifying the space. Its auto-shutdown function can turn the unit off if the basin runs out of water.

Product Specs 

  • Type: Ultrasonic
  • Mist: Cool
  • Tank Capacity: 1.6 gallons
  • Coverage Area: 500 square feet


  • 50 hours of use before refilling
  • Analog knob for adjusting humidity
  • Essential oils compartment included
  • Auto-shutoff function


  • No humidistat included
  • Not meant for large spaces over 500 square feet

Get the Everlasting Comfort humidifier on Amazon.

Best High-Capacity

The Best Humidifier For Large Room Option: AIRCARE MA1201 Whole-House Console-Style Humidifier

With a huge 3.6-gallon capacity, the AIRCARE MA1201 whole-house evaporative humidifier produces enough water vapor to treat up to 3,600 square feet. Its built-in humidistat turns the unit off and on automatically, depending on the humidity levels in the home. The user can set it and forget it. A digital control panel with clearly labeled buttons helps users easily adjust the humidifier’s humidity levels and fan speed. It also shuts off automatically when the unit is empty, preventing the motor from burning out.

With its sturdy set of casters, users can roll this large cool-mist humidifier from room to room. At a weight of 14 pounds and measuring 21 inches wide, 14 inches long, and 20.5 inches high, this is one of the larger humidifiers on the market.

Product Specs 

  • Type: Evaporative
  • Mist: Cool
  • Tank Capacity: 3.6 gallons
  • Coverage Area: 3,600 square feet


  • Built-in humidistat
  • Digital control panel
  • Automatic shutoff
  • Built-in casters for portability


  • Large, heavy construction
  • Less adjustability than comparable options

Get the AIRCARE humidifier on Amazon or at The Home Depot.

Tech Pick

The Best Humidifier For Large Room Option: LEVOIT Smart Humidifier

For those who love high-tech, this LEVOIT Smart Humidifier may be for you. With a 1.5-gallon tank capacity, this pick is suitable for 500 square-foot rooms and distributes cool-mist air 4x faster than other brands’ humidifiers. Smart connectivity through the Vesync app also allows you to alter the humidity levels with your smartphone, though it does connect to Amazon Alexa and Google Assistant as well.

The included smart humidity sensor can trigger an auto mode to adjust moisture levels based on the room’s current condition or manually use the voice-command option if you have your hands full.

It’s small BPA-free construction is compact and easy to place anywhere and comes with an adjustable night light, LED control panel, and operates at under 30 dB of sound, making it perfect for bedrooms and nurseries. Need more? It can also act as an essential oil diffuser. The only downside to this particular model is that it needs frequent cleaning to maintain proper functionality.

Product Specs 

  • Type: Ultrasonic
  • Mist: Cool
  • Tank Capacity: 1.5 gallons
  • Coverage Area: 500 square feet


  • WiFi connectivity included
  • Voice-control capability
  • Automatic humidity sensor built-in
  • Built-in adjustable night light


  • Some users report leaking and connectivity issues
  • May malfunction if overfilled
  • Frequent cleaning required

Get the LEVOIT smart humidifier on Amazon.

Best Design

The Best Humidifier For Large Room Option: AIRCARE EP9 800 Digital Whole-House Pedestal-Style

With its faux-wood panel sides and dark espresso stain finish, the AIRCARE EP9 800 Digital Whole-House Humidifier is the best cool mist humidifier, a bonus for those wanting to treat the air in a large room while still preserving the interior decor. This humidifier’s 3-gallon capacity is enough to treat an entire 2,400-square-foot home.

At 27 pounds, this large humidifier probably needs a permanent space in the home. Users can trade out the model’s replaceable tile top to match the room’s decor. Use the digital controls to adjust the humidity level and its nine fan speeds. An automatic shutoff feature prevents the motor from burning out when the reservoir is empty.

Product Specs 

  • Type: Evaporative/whole house
  • Mist: Cool
  • Tank Capacity: 3 gallons
  • Coverage Area: 2,400 square feet


  • Nine fan speeds built-in
  • Replaceable tile top
  • Digital control panel
  • Automatic shutoff feature


  • Large, heavyweight unit; may take up space
  • Some users report loud operation volumes

Get the AIRCARE pedestal-style humidifier on Amazon, The Home Depot, and Lowe’s.

Best Whole-House

The Best Humidifier for Large Rooms: Aprilaire - 800Z 800 Whole Home Steam Humidifier

The Aprilaire 800Z is a high-output steam humidifier that works in conjunction with a furnace and can provide precise humidity levels for homes of up to 6,200 square feet.

Special heating electrodes allow use of ordinary tap water, unlike competitors that often require a purified supply. Once the digital humidistat is set, outdoor and indoor sensors ensure automatic maintenance of the desired humidity, so this is a set-and-forget device. Alarm lights on the main unit warn of problems with water supply, steam production, drain blockage, or when the humidifier needs to be serviced.

For homes without an existing HVAC system, a version is available that uses a wall-mounted fan situated in the main living space. Professional installation is strongly recommended for either model. However, the steam canister, which needs to be replaced every 6 to 12 months, can be changed by the user.

Product Specs

  • Type: Whole-house
  • Warm vs Cool Mist: Unlisted
  • Tank Capacity: 34.6 gallons
  • Compatible Square Footage: 6,200 square feet


  • Runs from ordinary household water
  • Dual sensors optimize humidity automatically
  • Modest running costs


  • Quite expensive
  • Professional installation required

Get the Aprilaire home stream humidifier on Amazon.

Also Consider

The Best Humidifier For Large Room Option: Venta LW45 Original Airwasher

With an ability to clean the air as well as humidify it, this model from Venta is a great option for those looking to improve the air quality in their home as well as humidify it. Considered our list’s best humidifier for allergies, Airwasher uses a set of rotating disks that collect dust and pollen as they rotate inside the water reservoir while simultaneously releasing clean water vapor.

This system, which can treat up to 600 square feet, works entirely on water, leaving no filters to clean or change. Simply empty the basin and rinse out impurities every 10 to 14 days to clean it. With its LED display and controls, this unit is simple to turn off or on or adjust between its three power levels. An automatic shutoff turns off the humidifier when the reservoir is empty.

Product Specs 

  • Type: Evaporative
  • Mist: Cool
  • Tank Capacity: 3 gallons
  • Coverage Area: 600 square feet


  • Rotating disks collect pollen and dust
  • No filter required for operation
  • LED display and controls
  • 3 power levels included


  • Pricey
  • Requires maintenance every 10-14 days

Get the Venta airwasher on Amazon, The Home Depot, and Lowe’s.

Our Verdict

With so many humidifiers on the market, it can be difficult to find a unit that can satisfy your home’s humidity requirements. One of the best options overall is the ultrasonic LEVOIT humidifier with its warm and cool mist capabilities, 1.5-gallon tank, and the ability to add humidity to spaces of 750 square feet. Alternatively, if you require a budget-friendly option that can remove dry air in smaller spaces, the ultrasonic Everlasting Comfort humidifier has a 1.6-gallon tank, cool mist settings, and covers 500 square feet of space.

How We Chose the Best Humidifiers for Large Rooms

We researched the most sought-after humidifiers for large rooms in their respective categories and discovered that the best models are determined by their type, tank capacity, coverage area, settings included, size, and other special features included by select brands.

While researching for the best models, the most popular types were the evaporative and ultrasonic humidifiers for their compact size, ample square footage covered, and ease of use. Though less popular, the whole-house picks offer even more humidity with their considerable tank sizes and abundant settings. No matter the type, the above list prioritizes humidifiers with tanks of 1.5 to 18 gallons, providing 500 to 4,200 square feet of coverage. Plus, our list includes cold and warm mist humidifiers.

Many of our selected models also include ample settings including automatic shutoff and multiple air speeds depending upon your preference. Though some of the models are large and take up space, others are compact enough to keep on a nightstand or desk. In the interest of finding the best options possible, select picks listed also include dual sensor technology, filterless operation, rotating disks, remote controls, smart home connectivity, and digital control panels.

Tips for Using a Humidifier for Large Rooms

Now that you know more about large humidifiers, you may need some information about how to use one properly. Though you are looking to regulate and control the humidity in your home, always be aware of your humidifier’s settings to avoid adding too much moisture in your space. It is recommended that you keep a room under 50 percent moisturized as anything more can cause mold and mildew to grow.

Another thing to be aware of when using a humidifier is the type of water to use in your tank. A good practice is to always use distilled water rather than tap water as this prevents unsavory particles from filtering through the humidifier and into the air. Finally, always be sure to clean your humidifier properly so it can maintain proper functionality. Here are a few more tips to keep in mind for operating a humidifier correctly:

  • Before refilling your humidifier’s tank, be sure it is completely dry and empty to avoid standing water and mold.
  • If your humidifier requires a filter, be sure to monitor when it needs to be replaced.
  • It is recommended that you leave a door open in the room where the humidifier is placed to avoid over-humidifying a room.
  • Warm mist humidifiers that boil water can become hot to the touch. Please exercise caution if you live in a home with pets or animals.


If you’re still wondering how humidifiers work, keep reading for answers to some of the most commonly asked questions about these appliances.

Q: What is the recommended indoor humidity level?

The ideal indoor humidity level for health and comfort is between 40 and 50 percent to help ease cold and allergy symptoms and make breathing easier while not making the air so humid that it promotes mold growth.

Q: Where should a humidifier be placed in a room?

The best place to position a humidifier is a few feet from the bed. This position allows the moist air to circulate enough to ease cold and allergy symptoms while not being so close that the user can breathe into it and distribute germs around the room.

Q: Can I run my humidifier all night? 

It’s safe to leave a humidifier on all night if the unit has an automatic shutoff feature that turns off the unit when the reservoir is dry. An evaporative humidifier should also have a humidistat that turns off the unit after it reaches a certain humidity level to prevent the unit from over-humidifying the room.

Q: Can I use tap water in the humidifier? 

Although it’s OK to use tap water in a humidifier, distilled water is a better option. Tap water often has minerals in it that can leave deposits inside the humidifier or get released with the water vapor, leaving white dust on furniture around the room.

Q: Is a warm or cool mist humidifier better for sinuses?

If you have sensitive sinuses or are suffering from a cold or flu, any cold or warm mist from a humidifier can help to ease your sinus congestion. However, warm mist may be a better option as it can soothe the sinuses more effectively.